Nut-lock.



UNITED sTAjEs PATENT onirica.

Specification of Letters Patent.

Patented Aug. 28, 1906.

Application nea ma 5,1906. serle No. 301,600.

To all whom it may concern,.-

Be it known that I, WILLIAM H. LONG, a citizen of the United States, residing at Howard, in the county of Center and State of Pennsylvania, have invented a new and useul Nut-Lock, of which the following 1s a specification. i l

This invention relates to nut-locks, and 1s primarily designed to provide for locking ordinary nuts in a` sim e and improved manner without material y altering the nuts and also to enable the convenient release of the nut no matter how firmly the latter has been tightened. It is also proposed to enable the repeated use of the nut without damage to the latter and the bolt, thereby prolonging the lives of these members.

With these and other objects in view the present invention consists in the combination and arrangement of parts, as lwillbe hereinafter more fully described, shown in the accompanying drawings, and particularly pointed outin the appended claim, yit being understood that changes in the form, proportion, size, and minor details may be made Within the scope of the claim without de artirg from the spirit or sacrificing any o Vthe a vantages of the invention.

In thedrawings, Figure 1 is a side elevation of a bolt and nut equipped with the locking device o'f the present invention. Fig. 2

. is a sectional view on the line 2 2 of Fig. 1.

Fig. 3 is a detail view of the nut. Fig. 4 is a detail view of the Washer. Fig. 5 is a view similar to Fig. 4, showing the washer provided with a plurality of lookin depressions.

Like characters of reference esignate corresponding parts in all of the figures of the drawings.

The present invention includes an ordinary bolt 1, havin one end rovided with any conventional orm of hea 2 and its other end portion threaded, as at 3. In addition te these conventional features the threaded portion of the bolt is intersected by diametrically opposite longitudinal grooves or channels 4, o enin through the threaded extremit of t e bo t. The nut 5 is of conventiona form and in addition is provided upon its rear face with a shallow boss or proA jection 6, which is tapered or beveled from its opposite ends outwardly'rom the nut and intersect in a straight edge which is radial with respect tothe bolt-o emng. For the purpose of locking the nut here 1s a locking- Washer 7, havinfr a smooth bolt-opening 8, from the walls ofpwhich extend diametrically olpiosite projections 9 of a size and shape to s i ably fit in the grooves 4 of the bolt, whereby the washer may be slid along upon the bolt under the ti htening infiuence of the nut. That face of the washer which is adjacent the nut is provided with a shallow de pression 10, approximating the size and shape of the boss or projection (i of the nut, so as to receive the same in the locked condition of the nut. After' the bolt has been thrust through a piece of Work, such as shown at 11,

a helical spring 12 is placed u on the threaded end of the bolt a ainst t 1e work. The Washer 7 is then fittedg to the bolt and slid up a ainst the spring, after which the nut is app)ied and tightened to the desired degree. uring the tlghtening of the nut the boss or projection 6 will wipe across the Washer and the latter will rield against the advancing movement of t 1e nut until the latter has been )roperly tightened, with its boss receive in the seat or depression l0. As the Washer is locked against rotation by means of it's projections 9 ittinfr in the grooves 4 of the bolt and the nut is lnterlocked with the Washer by reason of its boss G being received Within the depression l() of the washer, said nut is locked against accidental rotation and consequent looseness.l 'llo release the nut, it is forcibly turned in a direction to unscrew the same, and as the )rejection 6 Wipes across one beveled or inclined wall of the depression the Washer will be forced toward the Work so as to enable the loss working out of the depression 10, where y the nut can be readily loosened and finally removed.

A' very important feature of the resent invention resides in the shape and s lallowness of the locking projection 6 and the complemen/tar seat 10, whereby only a slight fielding o 'the Washer is necessary to enable oosening of the nut, and as the nut cannot be tightened to such an extent' that th spring 12 cannot be further compressed it isf a ways ossible to readily release the nut byl a forcib e unscrewing thereof. It.will also be noted that there is no injury done to the nut, the Washer, the bolt, nor t e work, wherefore the several elements may be repeatedly used to ood advantage.

The internal ri s in Figs. 4 and 5 of the drawin preferably are located at the inner ends o the deepest portions of the seats 10,

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so es to strengthen the Washers 7 at the points where they are weakened by seid depressions or seats 10.

llm'ing thus described the invention, what. is ('lnilned is- A nut-lock oolnprising st bolt having a pztir ol'Y dininetrii'ailly opposite longitudinal grooves intersecting its threaded portion, n non-roteteble washer having a pair of internal ribs for engagement with the grooves and provided in its outer face with a shallow sent formed with flat inclined wells, one of said internal ribs being located a-t the inner end of the deepest portion of said seat to strengthen the washer at that point, n nul lowing .ft shallow boss or projection formed with lnl beveled faces to engage thv seat ol the washer and interlock these members, und a helical spring embracing the bolt inthe rear of the washer t0 yieldably force the letter against the nut.

ln testimony that l Gleim the foregoing es my own l. have hereto allixed my signature in the presence of two witnesses.

, WILLTAM II. LONG. Witnesses:

J. Ross CoLuoUN,

(E. E. BOYLE.- 

